塔柱式地铁车站的围岩稳定性及施工力学研究

发布时间：2018-05-19 05:22

本文选题：塔柱式地铁车站 + 围岩稳定性　；参考：《西南交通大学》2015年硕士论文

【摘要】：在城市复杂的交通环境下,采用明(盖)挖法修建地铁车站施工困难时,浅埋暗挖法因其施工安全性较高且对环境影响小而得到广泛应用。青岛地铁敦化路站受站间距所限,埋深较大,而地质条件又比较好,位于微风化花岗岩中,为了突出青岛特色,敦化路站拟建为暗挖塔柱式车站。塔柱式车站在我国应用较少,相应的理论研究不足,施工经验欠缺,况且塔柱式车站开挖洞室较多,施工过程力学转换频繁,因此研究敦化路站下的围岩稳定性及塔柱式车站的施工力学行为较为必要。本文以青岛地铁3号线敦化路车站为依托,以新建塔柱式地铁车站为研究对象,开展了塔柱式地铁车站基于强度折减法的围岩稳定性研究、二维和三维的车站主体部分开挖数值模拟以及联络通道开挖的三维数值模拟,并依托敦化路站现场第三方监测对施工过程进行现场监控量测,结合数值模拟对监测数据进行对比分析,主要研究工作如下：(1)用数值模拟下的强度折减法对青岛地铁敦化路站围岩稳定性进行了研究,揭示了强度折减下的围岩劣化规律,并得出了相应的安全系数。(2)用数值模拟对敦化路站主体结构不同施工方案进行分析,揭示了不同施工方案下的敦化路站主体结构施工力学行为及地层变形特性。(3)用数值模拟对敦化路站联络通道的施工进行分析,揭示了联络通道开挖对主体结构的应力及位移影响规律。(4)现场监测敦化路站施工过程,结合数值模拟对监测数据进行对比分析,监测数据分析结果与数值模拟结果基本一致。
[Abstract]:In the complex urban traffic environment, when it is difficult to construct subway station by using open (cover) excavation method, shallow underground excavation method is widely used because of its high construction safety and little environmental impact. The Dunhua Road Station of Qingdao Subway is limited by the distance between the stations, buried deeply, and the geological conditions are better. In order to highlight the characteristics of Qingdao, Dunhua Road Station is to be built as a stealthy tower column station. The tower station has less application in our country, the corresponding theoretical research is insufficient, and the construction experience is short. Besides, there are more excavated caverns in the tower station, and the mechanical transformation in the construction process is frequent. Therefore, it is necessary to study the stability of surrounding rock under Dunhua Road Station and the construction mechanics behavior of tower station. Based on the Dunhua Road Station of Qingdao Metro Line 3 and the newly built tower column subway station as the research object, the stability of surrounding rock of the tower column subway station based on the strength reduction method is studied in this paper. Two and three dimensional numerical simulation of the main part of the station excavation and three dimensional numerical simulation of the excavation of the contact channel, and based on the third party monitoring of the Dunhua Road Station, the site monitoring and measurement of the construction process is carried out. Comparing and analyzing the monitoring data with numerical simulation, the main research work is as follows: (1) the stability of surrounding rock of Dunhua Road Station of Qingdao Metro is studied by using the strength reduction method under numerical simulation, and the deterioration law of surrounding rock under strength reduction is revealed. The corresponding safety factor is obtained. Different construction schemes of the main structure of Dunhua Road Station are analyzed by numerical simulation. This paper reveals the construction mechanics behavior and formation deformation characteristics of the main structure of Dunhua Road Station under different construction plans. The numerical simulation is used to analyze the construction of the connecting passage of Dunhua Road Station. It is revealed that the stress and displacement of the main structure influenced by the excavation of the connecting passage. (4) the construction process of Dunhua Road Station is monitored on the spot, and the monitoring data are compared and analyzed with numerical simulation. The results of monitoring data analysis are basically consistent with those of numerical simulation.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U451.2;U231.3

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